Initial Production Batch

Turing the initial prodcution machining, the machining speed and feed parameters used during prototyping was . . . show details

During the initial prodcution machining, the machining speed and feed parameters used during prototyping was slowly increased. Gradually, the machine time per bottle opener was reduced from18 minutes to 15 minutes. The vibratory deburing took another 4 hours and tumble burnishing takes around 2 hours. The logo engraving process takes another 5 minutes.

Bottle Opener Revision3

The mouth lip was modified for better clearance and the center cavity was removed to help . . . show details

The mouth lip was modified for better clearance and the center cavity was removed to help speed up the machining process and the logo were modified to reflect the coarser resolution of electrochemical etching. The height was also reduce to better fit the raw stock height.

Fixture Machining

Machining Tool Path Planning

Before the g-code can be written, the transition points for the machining tool path needs to be determined. In g-code, the tool path is represented by a series of linear and circular moves. Each transition point, ie where straight line meets a curve or where curves of different radius meets, needs to be specified in terms of its X-axis and Y-axis coordinate.

Product Dimensioning with LibreCAD

A dxf file was exported from FreeCAD and imported into LibreCAD for dimensioning the endpoints for writing g-code. Since the current version of FreeCAD, v0.12, is millimeter only, a reduction factor of 25.4 was applied to the imported dxf file to derive the measurements in inch.